* {
    margin: 0;
    padding: 0;
}
a {
    text-decoration: none;
}
.header {
    height: 40px;
    line-height: 40px;
    background-color: red;
    text-align: center;
    font-size: 20px;
    font-weight: bold;
    background-color: #f3f5f7;
}
.con-table {
    width: 1200px;
    /* border: 1px solid red; */
    margin: 20px auto 0;
    border-collapse: collapse;
}
.con-table tr {
    width: 1200px;
    height: 50px;
}
.con-th tr {
    background-color: #EDEDED;
}
.con-th th,
.con-tb td {
    border-bottom: 1px solid #E0E0E0;
}
.con-th th,
.con-tb td {
    width: 200px;
    text-align: center;
}
.con-tb button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid #ccc;
    transition: all 0.3s;
    cursor: pointer;
}
.con-tb button:hover {
    box-shadow: 1px 1px 4px 1px #ccc;
}

